Problems starting the engine

[fmicle]

Hi,

I've had my Yaris for 6 days now, am happy with it, but I've been experiencing a problem when starting the engine. I try to start it and sometimes nothing happens. Just like when you don't have the clutch pedal depressed. It happened a few times already, so I'm starting to get worried. This morning it happened on the exit ramp off the highway. I was waiting for traffic to pass, it was a little steep, so I stalled the engine. It took me about 5 tries to re-start it. It's weird, it doesn't happen all the time, I keep trying a couple times and eventually it starts. Afterwards I went to get gas and after I filled it, it didn't start either the first 2 tries. Does anyone have any idea, did anyone experience this before?

Thanks, Florin